Roll-stripping means for cementing machines



June 16, 1953 w, P, os oo 2,642,032

ROLL-STRIPPING MEANS FOR CEMENTING MACHINES Original Filed April 12,1950 7 1 {/2 FIG.

INVENTOR {jg WALTER F. 056000 ww m Arr'rs Patented June 16, 1953norznsrmrrme MEANS FOR CEMENTING Q MACHINES Walter P. Osgood, Maiden,Mass, assignor to Boston Machine Works Company, Lynn, Mass., acorporation of Massachusetts 1 Original application April 12, 1950,Serial No.

" 155,543. Divided andcthis 'applicati n 1950, Serial No. 201,182

c Gianna; (Cl. 118-245) This application is divided from application,Serial No; 155,543, filed April 12, 1950, for Cementing Machine. Theinvention 'relates to inn provem'ents in mechanisms for applying a filmof liquid adhesive to pieces of sheet materi'alsuch I as thin leatherwhich has been out to form various shapes for use in shoe uppers,thefilm being applied by means of a rotating roll which dips into a poolof the adhesive. More particularly,

forward post 23 and a rear post, not shown. A shaft 3 extends throughtheupper portion of the post 28 and through the opposite portion of thewall 24, this shait'having a portion which projects out beyond the base20 to upp rt some of the pulleys which are employed in the drivmgmechanism. The part B comprises a trough '52 in-which is rotatablymounted a coating roll 54 and a receptacle '52 which is adapted toreceive an inverted bottle or jar 14 containing a supply of liquidcement. When a jar of cement is inverted and placed in the receptacle,the cement escapes from the jar until the mouth of the jar is sealed bythe pool of cement in the the invention relates to improved means for'10 receptacle l2." This receptacle. is connected with strippingfrom theroll work pieces which have the trough 52 so that the pool of cement ith been applied thereto to receive a coating of adtrough is maintainedat a predetermined level hesive. as long as there is a reserve supply inthe jar l4. According to the invention, stripper fingers 'Theforwardedge of the trough 52 has a lip'afi are provided, together withconvenient and cites. 15 to which is detachably secured a suitabledoctor tive support means therefor, which can quickly blade 83. A pairof set screws 90 bear against and easily be mounted in place for use'orremoved the edge of the lip 86 and are adjustable to regufrom themachine for cleaning or replacement. late the clearance between the edgeof the doctor For a more complete understanding of the in- 88 and thesurface of the coating roll 54. In vention, reference may be had to thefollowing order to secure the doctor to the lip'86, a pair descriptionthereof and to the drawing, of of bolts or screws 92 having Wing heads94 at which- I one end and plain heads 96 at the other end are Figure 1is a plan view of a cementing mascrew threaded through the doctor blade83; chine which includes an embodiment of the in- On the opposite sideof the roll are mounted ti stripping fingers me. These are supported byFigure 2 is a section on the line 2-2 of Figure a bar H32 which isrockab i ted so as to extend parallel to the trough and coating roll.Figure 3 is a fragmgntary e1evation of one 0f A center not which isfixed in an ear I06 at the the stripper fingers, on a larger scale,showing end of the trough 52 enters one end of the .bar itsrelation tothe supporting bar. 192; a 06111781 3 carried y a Spring I"! W ich. Themachine illustrated on the drawing is a mounted on a Side Wall Of the pac T2 portable bench type of machine consisting of enters the other endof the bar 102 so that the three majgr parts which can be easi1y disasbarcan readily rock about these centers. The sembled. The partdesignated A includes a base uppsr face Of the barv is transverselyslotted in 26 which carries a suitable electric motor, the 35 sevml1913409538 at HZ, these slots being sli position of the motor beingindicated in' broken 3' Wider a the thickness of the pp fi rs lines at22. The part A also carries a work table, 9- I AS indicated in Figures 2d 3, the ba "3 pulleys belts, and haft The vpart B is is transverselyinclined so that it slopes downtachably secured to the part A andincludes a a oward the trough 52 at an angle 0f ptrough for holding apool of liquid cement, means 40 PTOXimBJtQIY although it is horizontal gfor maintaining the pool at a constant level, a .illldinally- "EachStripping fi e I9 is p fcoating roll dipping into the pool a doctor to by made from Sheet material /8 Of an inch regulate the thickness of thefilm carried by the thick 50 that it has parallel S e fa es- 'Eachcoating 11 and st i ping'means. The part c finger has a base portion M4which is slotted-as is hinged to the part A and consists of a frame atMt so that the base of the finger can be'slid which supports two feedingand guiding rolls on to the'bar m2 at one of the 'slots [[2, the and aguide plate above the coating roll. thickness of the bar where it isslotted being Rising from the base as is a wall 2% which e xslightlyless thanth'e width of the slot I I6. The tends from irontto rear.Parallel to the wall Ell upper portion of each finger N30 is a head 'II8 is a second wall 26 which extends between a tapering to a point I25which is adapted to rest against the surface of the roll 54%. Ihe underedge #22 of 'the'head is arcuate, itscurve being substantiallytangentto' the curvature of the roll surface as it curves gradually awayfrom the sur face of the roll downward from the point I20.

The upper edge of the head I I8 is bevelled on both sides as at I24 toan edge so that the point I is the intersection of three planes. Asindicated in Figure 3, the slot H6 is slightly wider than the slottedthickness of the bar I02, this difference being exaggerated in 'Figure3. A finger can quickly be mounted on the bar I02 by aligning its slotII6 with a slot H2 and moving it forward across the bar until the tipI20 touches the roll. The downward pull of gravity on @the finger andthe reactive upward pressure of the roll against the tip I 20 of thefinger tend to cause the finger to rock in a clockwise direction asshown in Figures 2 and 3 so that it presses against the upper face ofthe bar I02 at the ,point I20 and against the lower faceof 'thebar atthepoint I23. Thus the fingers I00 on the bar normally impress a torqueof small magnitude tending to rock the bar in a clockwise direction. Abracket I is secured to the bar and extends downward. This bracket issupplied with :a .set screw I32 which bears against the rear face of thepart E to act .as an adjustable stop tor'the clockwise rocking movementof .the bar I02 whereby the ,angle of transverse inclination of the :bar:can :be regulated. The bar, as seenin Figure. 2, is free to rotate in acounterclockwise direction such rotation being opposed by the engagement:of the fingers I00 against the roll '54. This'method of mounting thestripper fingers is particularly advantageous sincethe nose of eachfinger bears lightly but constantly againstthe surface of the roll. Thetwo methods of mounting stripper fin gers heretofore in use are therigid gang-amounting of a number of fingers on a bar adjacent to theroll, and the individual mounting of fingers rock- 'ably on acylindrical bar in such a manner as to let them bear against theroll-bytheirown weight :and be .free to rock away from the roll. llhe firstmethod is troublesome because .of the dif- "ficulty of adjusting thefingers for-uniform bearing of all the fingers against the .roll. Thesecond method is troublesome because of the frequency with which thework pieces drag 'on some of the fingers :and cause them tozfiop overaway from the roll. According to thepresent mounting of the fingers, thefingers areindividually held lightly against the roll by gravitybut-cannot :rock away from the roll. .Each finger can be instantlymounted on or removed from the bar and is automatically self-adjusting.

The part C consists primarily of atransverse frame member I40 extendingsubstantially the full width of the :machine and supporting tworotatable rolls I42 and I544. The frame I40 has "a'pair of integralfarms I41 and I448 throughwhich extends the fixed shaft 34, this shaftacting as a hinge pin about-which the partC can be rocked forward. Therolls I42 and I44 which are carried by the frame I40 are parallel to"each other and to the coating roll 54. They are preferably of smallerdiameter than the roll 54'and are sup- .ported above it. The guide rollsI42 and I44 are "spaced apart to provide aclearance between them whichis greater than the thickness "of any .material which is to be fed tothe machine for coating. The clearance between the rolls .I42 and 144and the coating roll 54 is likewise greater than the thickness of thematerial ied thereto. In order to prevent any sagging of the rolls I42and I44, the frame I40 Jmay be stifiened by a truss rod I which issecured to cars I52 and I 54 projecting up from the top of the frameI40. The frame .I 40 also carries a guide blade I which slopes from theforward edge of theframe rearwardly toward the clearance between therolls I42 and I44, as indicated in Figure 2, so that a piece of flexiblesheet material such as split leather which is fed toward the guide rollsis guided by the blade I60 down between the two rolls and "against thetop of the coating roll 54. The guide rolls I42 and I44 are driven so asto rotate toward each other with peripheral speeds greater than theperipheral speed of the coating roll 54.

The coatingroll :54 and the guide rolls I42 and I 14 are driven by anysuitable means such as the beltand pulley connections shown in Figure l..A motor shaft is indicated at I'IIl, a pulley wheel .-I.l2 beingmounted on this shaft. A belt II'4connects the pulley wheel I72 to themiddle sheave 1-16 .of a triple pulley, the other two sheaves J18 and Ibeing on a common hub with the sheave 'I'IB, this hub being rotatablymountedzon the shaft 34. 'A belt I82 extends from the sheave I78 to anidle pulley I04, the upper stretch of this belt passing between therolls I42 and I44 which are grooved to receive the belt. A third belt[750 extendsirom the sheave I80 to the pulley wheel :40 to drive thecoating roll. Since the part C swingsabout the shaft .34 as an axis, andsince the sheave I78 revolves about the .same axis, the part C can beswung back without disturbing the drive connections by which the rollsI42 and I44 are rotated when the machine is in operation. To limit theswing of the part C, the adjusting screw I40 is so located that its headengages a horizontal rod 200 as astop member, this horizontal rod beingmounted at oneend on .an upright post 202 which is secured tothebasei2f0. Thehorizontal rod 200 also supports a work table 204 whichextends from the rod toward the guide .rolls I42 and I44. Arpin 203.extendsihorizontally from the lug I4! to support therear portion of the.table 204. Hence thetablemust beswung out of the way before the part Ccan be swung to its inoperative position.

When it .is .desired to .use the machine, a jar or flask 'l'I'4 .ofsuitable cement is inverted and placed in the receptacle "I2. The motoris started and .pieces of work are slid manually on the table top 204until the leading edge of each work piece engages thegguide roll I42.The roll then acts tofeed the workpiece along, theileading edge beingdeflected downward by the guide blade I60 until itis further deflectedby engagement with the guide roll I 44. Since the latter is also driven,ithelps .to'feed the work piece along. The lead- .ing edge meets thesurface of the coating roll .54 which has picked up a film of cementfrom .the pool in the trough. This roll carries the work along until itis stripped from the roll by the fingers I00 which it encounters. Thisarrangement ofparts is efiective to properly feeding and guidingworkpieces of such material as split 'leather having irregular contours,with- .out causing the work pieces to buckle or jam in the apparatus.Before sending any work pieces through the machine, stripper fingers I00may .be arranged on the bar I02 according to the size and shape of thework pieces to be coated. Since cement which contains rubber latexcoagulates upon drying and is then difficult to remove, it is desirableto wash promptly all parts touched by cement whenever the apparatus isto be left idle even .for .a brief period such as a lunch hour. When asubstantial pause in operation is expected, the jar .I4.is removed fromthe receptacle and the table204is swung up to get it out of the way ofthe part C. The latter is then swung up to re water to remove residualcement therefrom. The

bar I02 with the fingers I00 thereon can be quickly removed from thecenters I04 and I08 by pressing on the spring IIO, and the coating roll54 can be lifted from the trough to facilitate the washing. Theseoperations can be very quickly and easily performed so that the machineis soon clean and can be at once reassembled to be ready for furtheroperation.

I claim:

1. In a coating machine which includes a trough for liquid cement and adriven roll mounted in said trough, means for stripping from said rollwork pieces which have been applied thereto to be coated, said strippingmeans comprising a support member rockable about an axis parallel to theaxis of said roll, and a plurality of stripper fingers on said supportmember each slidable independently thereon toward said trough, saidsupport member and fingers having mutually engaging surfaces lockingsaid fingers against appreciable rocking movement relative to thesupport member about the axis of the latter.

2. In a coating machine which includes a trough for liquid cement and adriven coating roll mounted in said trough, means for stripping fromsaid roll work pieces which have been'applied thereto to be coated, saidstripping means comprising a fiat bar extending parallel to said rolland transversely sloping downward toward the trough, and a plurality ofstripper fingers independently slidable on said bar toward or from saidroll, each said finger having a base portion with a slot receiving saidbar with a sliding fit to support the finger and an upper portionterminating in a point resting against the periphery of said roll.

3. In a coating machine trough for liquid cement and a driven coatingroll mounted in said trough, means for stripping which includes a fromsaid roll work pieces which have been applied thereto to be coated, saidstripping means comprising a fiat bar extending parallel to said rolland transversely sloping toward the trough, said bar having transversegrooves in a face thereof, and stripper fingers independently slidableon said bar toward and from said roll, each said finger being of sheetmaterial of a thickness slightly less than the width of said grooves andcomprising a base portion with a slot adapted to fit slidably on saidbar at one of said grooves and a head portion terminating in a pointresting against said roll.

4. In a coating machine which includes a trough and a horizontal coatingroll rotatably mounted therein, means for stripping from said roll workpieces which have been applied thereto, said stripping means comprisinga flat bar parallel to said roll, means rockably supporting said baroutside of and adjacent to said trough, said means including a fixedcenter extending into one end of said bar, a second center extendinginto the other end of said bar, and a spring element attached to saidtrough and second center and arranged to press said second centeryieldingly into said other end of the bar, stop means for limitingrocking movement of said bar in a direction away from said roll, and aplurality of stripper fingers slidable on said bar, toward or from saidroll, each said finger having a base portion with a slot adapted toreceive a portion of the bar and a headportion with a pointed extremityadaptedto bear against the surface of the roll, said bar normallysloping transversely downward toward said trough.

WALTER P. OSGOOD.

References Cited in the file of this patent UNITED STATES PATENTS NumberName I Date 872,392 Von Auw Dec. 3, 1907 1,804,365 Price May 5, 19312,225,457 Langsuer Dec. 17, 1940

